Cleansing device for gasification burner nozzles



No 19 1. H. EKSTRM 2,261,617

CLEANSING DEVICE FOR GASIFIGAIION BURNER NOZZLES Filed Oct. 4, 1940INVENTOR- )wHERMA/v 5K5? ROM ATITORNEKS' Patented Nov. 4, 1941TENT-(OFFICE BURNER NOZZLES CLEANSING DEVICE, FOR GASlFICATIONHerman'Ekstriim, Stockholm, "Sweden Application October 4, 1940, serialNo. 359,668 V In Sweden October 20, 1939 3 Claims. The present inventionrelates to liquid fuel gasification burners of the known kind comprisinga nozzle housing provided with a bore communicating with a supplychannel for gaseous fuel, the burner nozzle being removably secured tothe housing in alignment with the bore and having an :outlet orifice forthe gaseous fuel, a valve adapted to control and close the outlet oisaid supply channel and having; a spindle screwed into the housing andcarrying a pinion, the teeth of which protrude into the bore through anopening in the wall of the bore, said'pinionbeing in mesh with a rackcarrying a cleansing needle .at the one end, which needle is inalignment, with ,said orifice and adapted to be inserted into andwithdrawn from the orifice for cleansing the latter upon turning theaforesaid valve in the one or the other direction,

The manufacture of gasification burners of; this type is connected withthe'difiiculty of mounting the rack carrying the cleansing needlein,a"c'orrect engagement with the pinion offthe 'valve spindle. It isdesirable that the racksh'ould be 'fitted in some definite relation tos'aidfpinion, so that for example when the valve isfully closed,

the cleansing needle should have fully penetrated through the nozzleorifice, and that when opening the valve the cleansing needle shouldgradually be withdrawn from the orifice and be fully withdrawn when thevalve is fully open.

It is obvious that this can be efiected only if the engagement betweenthe rack and the pinion is a definite one, that is to say, when thevalve for example is closed, a certain tooth of the pinion should be inengagement with certain teeth of the rack, and the cleansing needleshould at the same time have penetrated the orifice to the full extent.To efifect such a correct engagement when assembling the burner orchanging the rack, it has hitherto been necessary to remove the valvespindle, then to insert the rack into the bore and hold the same so thata correct engagement may in some way or other be established when thevalve spindle is again screwed into the housing. This work has proved tobe very tedious and troublesome and to require quite a lot of time, infact this step in the manufacture of the burners has proved to be onethat slows down the rate of manufacture far too much.

The object of the present invention is to develop means by which thisstep in the manufacinvention is such that the valve spindle does notneed to beremoved but should be brought to its closing position beforethe rack is inserted into .the bore of the housing.

According to the invention this is efiected thereby that the other endportion (opposite to the needle) of the rack, which is inserted into thebore, has its facev opposite, to the toothed face .iobliquely out 01fna'rrowingly towards the end ture may be greatly hurried, and the rackcarryof the'rack' solas to:v enablethe rack, when inserted intothe bore,to befso tilted to an oblique position that'at least one tooth on saidend-portion may pass the pinion and the succeeding tooth of. the tiltedrack will abut against and, be stopped by, the pinion, whereupon therack, when brought to a position parallel with'the linear axis of thebore,.wil1 be in a correct engagement With therack} e 1 T i Anembodiment of thefinvention is illustrated on the accompanying drawing:

Fig. 1 shows a side: view of a ga's'ification burner, 1 the .parts,referring ,to' the invention being shown: in'section; :Fig. 2 shows asection of said the cleansing'needle', seen from the side opposite tothe teeth. Fig. 4 shows a section along the line IV-IV in Fig. 2. Figs.5, 6, and 7 show sections similar to that in Fig. 2 with the rack invarious positions during the insertion into the bore of thenozzlehousing.

As shown in Fig. 1, the nozzle housing I is provided with a bore 2, intowhich the rack 4 provided with the cleansing needle 3 is intended to beinserted.

The rack has the one end, being opposite to the cleansing needle,obliquely cut off at 5, on which oblique portion a projection 6 isprovided in the shown embodiment, the projection in the shown caseconsisting of a ball. Into an opening in the one side of the bore theteeth of a pinion 1 protrude, the pinion bein secured on a spindle 8provided with a valve controlling the gas inlet. On the opposite side ofthe bore a longitudinal groove 9 is made, which groove endsapproximately on a level with the linear axis of the valve spindle.

The insertion of the rack into the nozzle housing is efiected in thefollowing manner. When the burner nozzle ID has been screwed off, therack 4 is inserted in a tool H adapted to facilitate the insertion sothat an angle )8 (Fig. 6) is formed between the linear axes of the toolI! and the rack. In this position the rack is now inserted into thenozzle housing I in such a way reached the bottom end of the groove, andthe angle between the rack and the axis of the bore has been reduced toa.

An efiort to further insert the rack causes the latter to be turnedautomatically to a position parallel with the axis of the bore, the ball6 then leaving the groove 9, and the rack will be brought to the finalposition shown in Fig. 2, in which the rack and the pinion are in thedesired correct engagement. When the above described operation isundertaken, the valve spindle 8 should occupy the position of closure,as being a definite position, in which the teeth protruding into thebore 2 occupy predetermined positions. When the burner nozzle then hasbeen screwed onto the housing again, the device is ready for use.

The lower end of the groove 9 has been shown rounded on the drawing, butsaid end may of course instead be shaped as a straight inclined surface,along which the projection 6 slides downwards in the last part of thedownward motion of the rack.

Having now particularly described the nature of my invention and themanner of its operation what I claim is:

1. A cleansing device for gasification burner nozzles comprising, anozzle housing, a bore in said housing, a nozzle having an outletorifice for the gaseous fuel and removably secured in said housing inalignment with said bore, a supply channel in said housing for thegaseous fuel, said channel communicating with said bore, a valve adaptedto control and close the outlet of said channel, said valve having aspindle being screwed into said housing, a pinion on said spindle, anopening in the side of said bore, the teeth of said pinion protrudingthrough said opening into said bore, a rack mounted in said bore, theteeth of said rack being in mesh with the teeth of the pinion, acleansing needle at the one end of said rack, said needle being adaptedto be inserted into and withdrawn from said orifice for cleansingpurposes by turning said valve, and in which the other end portion ofsaid rack having its face opposite to the toothed face obliquely cutoff, and narrowing towards the end of the rack so as to enable the rack,when inserted into the bore, to be so tilted to an oblique position thatat least one tooth on said end portion may pass the pinion and thesucceeding tooth of the rack will abut against and be stopped by thepinion, whereupon the rack when brought to a position parallel with theaxis of the bore will be in mesh with the pinion.

2. A cleansing device for gasification burner nozzles according to claim1, and in which a projection is provided on the obliquely cut offportion of the rack, and a longitudinal groove is made in the side ofthe bore, into which groove said projection is to be inserted forguiding the rack when the latter is inserted into the bore, said grooveending approximately on a level with the linear axis of the valvespindle so that the projection when leaving the groove will.alltomaticallybring the rack to a position in mesh with the pinion.

3. A cleansing device for gasification burner nozzles according to claim1, having a projection upon the obliquely cut 01f portion of the rack,and having a groove made in the side of the bore for receiving saidprojection in order to guide said rack when the latter is inserted intothe bore, said projection including a ball securedto said rack, and saidgroove terminating approximately on a level with the linear axis of thevalve spindle so that said projection when leaving said groove willthereby automatically shift the rack into a position in which said rackmeshes with the pinion.v

HERMAN EKsTRoM.

